As I transcribe parliamentary debates, I also used the device as a recording device to replace the failed sound system, which worked well. Room size approx. 250 square metres, room height approx. 6m. I am otherwise very satisfied with the device and can generally recommend it.
The ICD-UX570 has a small built-in loudspeaker on the left side (seen from the front), the volume of which can be adjusted over 30 levels. The loudspeaker is sufficient to listen to a recording again directly on the unit.